Washing machine

Washing machine not draining? 4 likely causes

A washing machine that will not drain is the single most common washing machine call-out. In most cases the cause is a blockage in the pump filter or drain hose, which you can clear yourself in about 15 minutes.

Symptom: Water left in the drum after the cycle · Typical cost: £70–£150 for a pump replacement including parts; filter clearing is free.

Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.

Likely causes, most common first

  1. 1

    Blocked pump filter

    DIY: easy

    Coins, hair grips, bra wires and lint collect in the filter behind the small flap at the bottom front of the machine and stop water leaving the drum.

    The fix:Switch off and unplug, lay towels and a shallow tray down, slowly unscrew the filter and let the water out, clear the debris and check the pump impeller behind it spins freely.

  2. 2

    Blocked or kinked drain hose

    DIY: easy

    A kinked hose behind the machine or a blocked standpipe/trap stops water flowing away even when the pump works.

    The fix:Pull the machine out, check the hose for kinks, detach it and flush it through. Make sure the hose is between 60 cm and 100 cm high.

  3. 3

    Failed drain pump

    DIY: moderate

    If the pump hums but does not move water, or makes no noise at all, the pump motor or impeller has failed.

    The fix:Replace the drain pump. It is one of the most common parts engineers fit.

  4. 4

    Faulty pressure switch or control board

    Engineer job

    A faulty sensor can make the machine think it is empty, or never trigger the drain stage.

    The fix:Test and replace the pressure switch or have the board repaired.

When to call an engineer

  • Water is leaking while you work on it
  • The pump hums loudly but no water moves after the filter is clear
  • An error code stays on after a power reset
  • You are not comfortable working on the appliance, or the fix involves electrics or gas.

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Frequently asked questions

Why is my washing machine full of water and not draining?

Almost always a blocked filter, blocked hose or failed pump. Clear the filter first — it fixes the majority of cases.

How much does it cost to fix a washing machine problem like this?

£70–£150 for a pump replacement including parts; filter clearing is free.

Is it safe to keep using it?

If you can see leaks, smell burning, or the appliance is tripping the electrics, stop using it and unplug it. For minor faults without those signs it is usually safe to leave it off until you can diagnose it. Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.